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A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury

In the existing finite element head models (FEHMs) that are constructed from medical images, head tissues are usually segmented into a number of components according to the interior anatomical structure of the head. Each component is represented by a homogenous material model. There are a number of...

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Detalles Bibliográficos
Autores principales: Liang, Zhaoyang, Luo, Yunhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4745440/
https://www.ncbi.nlm.nih.gov/pubmed/27019594
http://dx.doi.org/10.1155/2015/837585
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author Liang, Zhaoyang
Luo, Yunhua
author_facet Liang, Zhaoyang
Luo, Yunhua
author_sort Liang, Zhaoyang
collection PubMed
description In the existing finite element head models (FEHMs) that are constructed from medical images, head tissues are usually segmented into a number of components according to the interior anatomical structure of the head. Each component is represented by a homogenous material model. There are a number of disadvantages in the segmentation-based finite element head models. Therefore, we developed a nonsegmentation finite element head model with pointwise-heterogeneous material properties and corroborated it by available experiment data. From the obtained results, it was found that although intracranial pressures predicted by the existing (piecewise-homogeneous) and the proposed (pointwise-heterogeneous) FEHM are very similar to each other, strain/stress levels in the head tissues are very different. The maximum peak strains/stresses predicted by the proposed FEHM are much higher than those by the existing FEHM, indicating that piecewise-homogeneous FEHM may have underestimated the stress/strain level induced by impact and thus may be inaccurate in predicting traumatic brain injuries.
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spelling pubmed-47454402016-03-27 A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury Liang, Zhaoyang Luo, Yunhua Appl Bionics Biomech Research Article In the existing finite element head models (FEHMs) that are constructed from medical images, head tissues are usually segmented into a number of components according to the interior anatomical structure of the head. Each component is represented by a homogenous material model. There are a number of disadvantages in the segmentation-based finite element head models. Therefore, we developed a nonsegmentation finite element head model with pointwise-heterogeneous material properties and corroborated it by available experiment data. From the obtained results, it was found that although intracranial pressures predicted by the existing (piecewise-homogeneous) and the proposed (pointwise-heterogeneous) FEHM are very similar to each other, strain/stress levels in the head tissues are very different. The maximum peak strains/stresses predicted by the proposed FEHM are much higher than those by the existing FEHM, indicating that piecewise-homogeneous FEHM may have underestimated the stress/strain level induced by impact and thus may be inaccurate in predicting traumatic brain injuries. Hindawi Publishing Corporation 2015 2015-01-29 /pmc/articles/PMC4745440/ /pubmed/27019594 http://dx.doi.org/10.1155/2015/837585 Text en Copyright © 2015 Z. Liang and Y. Luo. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Liang, Zhaoyang
Luo, Yunhua
A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_full A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_fullStr A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_full_unstemmed A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_short A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_sort qct-based nonsegmentation finite element head model for studying traumatic brain injury
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4745440/
https://www.ncbi.nlm.nih.gov/pubmed/27019594
http://dx.doi.org/10.1155/2015/837585
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